Ore-crusher.



No. 680,401. Patented Aug. l3, I90L.

C. SUTTIE.

on: CBUSHER.

(Application filed July 12, 1901.) (No Model.)

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CHARLES SUTTIE, OF ONEHUNGA, NElV ZEALAND.

ORE-CRUSHER.

SPEGIEIGATIQN forming part of Letters Patent No. 680,401, dated August 13, 1901.

Application filed July 12, 1901.

To all whom, it may concern:

Be it known that I, CHARLES SUTTIE, a subject of the King of Great Britain, residing at Onehunga, in the Provincial District of Auckland,New Zealand, have invented certain new and useful Improvements in Ore-Crushers; and I do declare the following to be a full,cle ar, and exact description of the invention, such as will en able others skilled in the art to which it appertains to make and use the same.

The invention relates to an ore-crusher, and more particularly to that class of machines known in the art as roller crushing or grinding mills for crushing, grinding, or mixing mineral ore or other substances.

The object of the invention is to provide a machine of this character which will be simple of construction, durable in use, comparatively inexpensive of production, eflicient in operation, and one in which the crushing pressure is gradually increased and applied to the ore in its movement through the machine. With these and other objects in View the invention consists of certain novel features of construction and combination of parts, which will be hereinafter fully set forth.

In the accompanying drawings, Figure 1 is an end elevation of my improved ore-crusher,

showing parts broken away to more clearly illustrate the invention. Fig. 2 is a longitudinal vertical sectional View.

Referring to the drawings, 1 denotes the crushing-chamber, cylindrical in form and disposed with its axis in a horizontal plane, and 2 denotes a supporting-base, to which the chamber is rigidly secured by links or other suitable means 3. The chamber is provided with end plates 4 andwith' sieves or gratings 5, which are bolted or otherwise secured to the ends of said chamber. The sieves or gratings are arranged at opposite ends of the chamher and to one side of a vertical line drawn through the axis of the chamber and may be integral with or separate from the end plates. The chamber is provided with a feed-hopper 6 at the highest point in its periphery, into which the ore to be treated is fed.

7 denotes a drive crusher-roll, and 8 a drive shaft to which it is fixed and which extends through large openings 9, located centrally in the end plates 4:.

Serial. No. 68,027. (N0 model.)

10 denotes a series of rolls located within the chamber and arranged annularly about the drive-roll 7. These rolls are loose-i. 8., have no journalsand are free to travel the annular race formed by the periphery of the roll 7 and the inner annular wall of the chamber. operation, travel around the center roll and are of such'number and of such diameter as not to fit tightly between the center roll and the interior wall of the chamber or against one another. In other words, sufficient slack or space is allowed between the loose rolls and center roll and the inner annular wall of the chamber to prevent jamming of the loose rolls and to allow space in the interior of the chamber for receiving and carrying the material to be operated upon. Byjournaling the axis of the center roll in the large bear ing-apertures 9 of the chamber the elfect will be to make the space between the periphery of the center roll and the inner annular wall of the chamber greatest at the top and lessening off on each side as the bottom is approached. The result is that the material becomes gradually reduced as it nears the bottom by reason of the decreasing distance between the crushing-surfaces caused by the contraction of the space above referred to, and as the material approachesthe lowest point of the chamber additional crushing pressure is applied to the material by reason of the fact that the weight or pressure of the lowermost rolls 10 will be materially increased as each succeeding roll passes from the righthand side of a vertical line drawn through the axis of the chamber to the left-hand side of said line. The drive shaft 8 may be weighted in any well-known manner to increase the pressing action of the drive-r0117.

In operation power is applied to the driveshaft to revolve the drive-roll 7. The motion of this roll bearing on such of the loose rolls 10 as support its weight causes these loose rolls to move bodily in the same direction as the center roll is driven, and this action forces the loose rolls around the race, each loose roll in its travel taking the weight of the center roll anda portion of the weight of the rolls above it. The material tobe operated upon having been (when so required) reduced by stone-breakers or otherwise to a These rolls 10, when the crusher is in size capable of being treated by this machine is fed through the feed-hopper and is carried around by the movement of the rolls and crushed between the rolls themselves and against the inner annular wall of the chamber. The grinding power is exercised mainly, in fact almost entirely, on that side of the mill which carries the freshly-fed material, and such grinding power increases as the material approaches the bottom of the chamber. After passing beneath the rolls at the bottom of the chamber the sufficiently pulverized portion of the material is discharged through the sieves or gratings, and such portion thereof as is insufficiently crushed is, by the continually-revolving action of the rolls, carried around and again comes under the grinding power of the crusher until sufficiently reduced.

Itis of course understood that all the rolls are of such length that they will fit as close between the end plates 4 as is compatible with least friction against them when revolving. The rolls, in other words, are to be of such length that when in motion they will revolve sufliciently freely to do their work without unreasonable Waste of power by reason of friction of the end plates, While at the same time they will fit, without sacrifice of such freedom of revolution, sufiiciently closely to prevent excessive entry of grit or dust between the end plates and the ends of' Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In an ore-crusher, the combination, with a cylindrical crushing-chamber provided with an inlet and an outlet, of a drive-roll mounted in said chamber, and a series of loose rolls located in the race of said chamber formed by the periphery of said drive-roll and the interior annular wall of said chamber and bodily movable about said race and driven by the action of saiddrive-roll, substantially as set forth.

2. In an ore-crusher, the combination, with a cylindrical crushing-chamber provided with an inlet in its periphery and a grated outlet, of a drive-roll having its axis loosely mounted in the ends of the chamber to rotate and having a vertical play therein whereby the roll may assume an eccentric or concentric relation with the chamber, and a series of loose rolls located in the race of said chamber formed by the periphery of said driveroll and the interior annular wall of said chamber, and bodily movable about said race, and driven by the action of the driveroll, substantially as set forth.

3. In an ore-crusher, the combination, with a cylindrical crushing-chamber provided with an inlet in its periphery, of sieves located in the ends of said chamber to the side of its axis, a shaft loosely journaled in the ends of the chamber, and having a vertical movement therein, a drive crusher-roll fixed to said shaft, and a series of rolls loosely mounted within the chamber between the interior wall thereof and the periphery of the driveroll and free to move around the chamber and driven by the action of the drive-roll, the aggregate diameter of said rolls being less than the circumference of the drive-roll, substantially as set forth.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHARLES SUTT'I E.

Witnesses: W. W. HOYWARD, GEORGE GRAHAM. 

